The non-minimum phase feature of tail-controlled missile airframes is analyzed. Three selection strategies for desired performance indexes are presented. An acceleration autopilot design methodology based on output fe...The non-minimum phase feature of tail-controlled missile airframes is analyzed. Three selection strategies for desired performance indexes are presented. An acceleration autopilot design methodology based on output feedback and optimization is proposed. Performance and robustness comparisons between the two-loop and classical three-loop topologies are made. Attempts to improve the classical three-loop topology are discussed. Despite the same open-loop structure, the classical three-loop autopilot shows distinct characteristics from a two-loop autopilot with PI compensator. Both the two-loop and three-loop topologies can stabilize a static unstable missile. However, the finite actuator resource is the crucial factor dominating autopilot function.展开更多
The control network is an important developmental orientation in the remote control system. As the control network and information network are comparatively alike in the framework and technology, we can build a contro...The control network is an important developmental orientation in the remote control system. As the control network and information network are comparatively alike in the framework and technology, we can build a control network which is similar to the common information network. In the era when the information network is becoming increasingly mature, it is a royal road to construct or rebuild a control information network in the development of the control network by relying on the achievements made in the information network or current information resources. This paper expounds the construction idea of the control information network, gives the idiographic realization method and then researches into the real-time problem encountered in the control information network, and presents a three-closed-loop control system based on virtualized reality. The feasibility of the idea is validated via experiments and simulations separately.展开更多
This paper presents a new inverter based on three-phase Boost/Buck-boost single-stage inverter. The basic configuration of the new topology and their fundamental principle are firstly introduced, the method of design ...This paper presents a new inverter based on three-phase Boost/Buck-boost single-stage inverter. The basic configuration of the new topology and their fundamental principle are firstly introduced, the method of design double-loop controller and sliding mode controller are clarified, analyzed and compared in the following. Finally the validity and feasibility of the new topology are tested by simulation. The results indicate that regulation of the voltage transfer ratio and output frequency can be realized optionally by the new converter, furthermore the harmonic distortion of waveform is low. So the inherent drawback of low voltage transfer ratio of traditional converter is effectively settled. This study may provide inspiration for further engineering application.展开更多
调配缓冲槽作为核燃料含铀含硝酸废液回收处理的重要设备,其液位控制稳定性直接影响整个含铀含硝酸废液处理系统的安全稳定运行。若缓冲槽液位控制稳定性差,可能会导致含放射性与有毒物质的核燃料废液溢流、上游工艺系统非计划停车等安...调配缓冲槽作为核燃料含铀含硝酸废液回收处理的重要设备,其液位控制稳定性直接影响整个含铀含硝酸废液处理系统的安全稳定运行。若缓冲槽液位控制稳定性差,可能会导致含放射性与有毒物质的核燃料废液溢流、上游工艺系统非计划停车等安全生产事故,不仅造成控制系统无法连续稳定运行,还会影响下游蒸发浓缩系统、膜过滤系统的运行状态及处理效率。针对含铀含硝酸废液处理系统中缓冲槽液位控制稳定性差的问题,本文提出一种基于模型辨识的多输入单输出液位控制系统方法。首先,利用现场调试数据,采用模型辨识方法建立多输入单输出缓冲槽液位控制系统数学模型。其次,在已建模型基础上改进相关控制方式,提出三回路串级控制方式,经仿真验证得到了一种自适应规则整定比例-积分-微分(Proportional-Integral-Derivative,PID)参数。最后,在工程实际中通过集散控制系统(Distributed Control System,DCS)组态和控制器自适应整定规则的写入,对所提的方法进行了验证。结果表明,该方法具备较强自适应能力,可有效提升系统的稳定性,缩短调节时间,成功解决调配缓冲槽液位控制效果不佳的问题,保证整个工艺生产平稳运行。展开更多
文摘The non-minimum phase feature of tail-controlled missile airframes is analyzed. Three selection strategies for desired performance indexes are presented. An acceleration autopilot design methodology based on output feedback and optimization is proposed. Performance and robustness comparisons between the two-loop and classical three-loop topologies are made. Attempts to improve the classical three-loop topology are discussed. Despite the same open-loop structure, the classical three-loop autopilot shows distinct characteristics from a two-loop autopilot with PI compensator. Both the two-loop and three-loop topologies can stabilize a static unstable missile. However, the finite actuator resource is the crucial factor dominating autopilot function.
文摘The control network is an important developmental orientation in the remote control system. As the control network and information network are comparatively alike in the framework and technology, we can build a control network which is similar to the common information network. In the era when the information network is becoming increasingly mature, it is a royal road to construct or rebuild a control information network in the development of the control network by relying on the achievements made in the information network or current information resources. This paper expounds the construction idea of the control information network, gives the idiographic realization method and then researches into the real-time problem encountered in the control information network, and presents a three-closed-loop control system based on virtualized reality. The feasibility of the idea is validated via experiments and simulations separately.
文摘This paper presents a new inverter based on three-phase Boost/Buck-boost single-stage inverter. The basic configuration of the new topology and their fundamental principle are firstly introduced, the method of design double-loop controller and sliding mode controller are clarified, analyzed and compared in the following. Finally the validity and feasibility of the new topology are tested by simulation. The results indicate that regulation of the voltage transfer ratio and output frequency can be realized optionally by the new converter, furthermore the harmonic distortion of waveform is low. So the inherent drawback of low voltage transfer ratio of traditional converter is effectively settled. This study may provide inspiration for further engineering application.
文摘调配缓冲槽作为核燃料含铀含硝酸废液回收处理的重要设备,其液位控制稳定性直接影响整个含铀含硝酸废液处理系统的安全稳定运行。若缓冲槽液位控制稳定性差,可能会导致含放射性与有毒物质的核燃料废液溢流、上游工艺系统非计划停车等安全生产事故,不仅造成控制系统无法连续稳定运行,还会影响下游蒸发浓缩系统、膜过滤系统的运行状态及处理效率。针对含铀含硝酸废液处理系统中缓冲槽液位控制稳定性差的问题,本文提出一种基于模型辨识的多输入单输出液位控制系统方法。首先,利用现场调试数据,采用模型辨识方法建立多输入单输出缓冲槽液位控制系统数学模型。其次,在已建模型基础上改进相关控制方式,提出三回路串级控制方式,经仿真验证得到了一种自适应规则整定比例-积分-微分(Proportional-Integral-Derivative,PID)参数。最后,在工程实际中通过集散控制系统(Distributed Control System,DCS)组态和控制器自适应整定规则的写入,对所提的方法进行了验证。结果表明,该方法具备较强自适应能力,可有效提升系统的稳定性,缩短调节时间,成功解决调配缓冲槽液位控制效果不佳的问题,保证整个工艺生产平稳运行。
